I use Project all the time on my Shadow, simply because it's one of my favorite animations in the game. Nothing is more rewarding than ripping rocks out of the ground and delivering them at high velocity to someone's face.
DPF sucks, but I have yet to find myself Force starved while fighting regular enemies. On boss fights I skip Project for Thrash so I can use the instant, free Mind Crush. My typical boss fights is me cycling through TT, FB and MC while weaving in Thrash for the MC procs. Probably not the most efficient way to do it, but the style is right up my alley. I love using a mix of lightsaber and Force abilities.
Edit: Force in Balance is in there as well on boss fights. Doesn't cost a lot of Force and crits for sicko damage.
Edited, May 10th 2012 11:47pm by Mazra